:root {
  --paper: #f7f8f7;
  --surface: #ffffff;
  --ink: #17201c;
  --muted: #66716b;
  --line: #d9dfdb;
  --forest: #145c3c;
  --red: #ba3528;
  --soft-green: #e9f1ed;
  --soft-red: #f6ece9;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(23, 32, 28, 0.12);
  background: rgba(247, 248, 247, 0.94);
  backdrop-filter: blur(14px);
}

.header-inner,
.page-shell,
.footer-inner {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
}

.brand-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--forest);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: 18px;
  font-weight: 700;
}

.brand-name {
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: 20px;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: var(--muted);
  font-size: 14px;
}

.site-nav a {
  padding: 22px 0 19px;
  border-bottom: 3px solid transparent;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--red);
}

.page-shell {
  padding: 56px 0 80px;
}

.home-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(260px, 0.7fr);
  gap: 64px;
  align-items: end;
  padding: 38px 0 54px;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.article-meta,
.work-label {
  margin: 0 0 14px;
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.home-intro h1,
.page-title,
.article-title {
  margin: 0;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-weight: 700;
  line-height: 1.18;
}

.home-intro h1 {
  max-width: 760px;
  font-size: clamp(42px, 6vw, 76px);
}

.home-intro h1 span {
  color: var(--forest);
}

.intro-note {
  padding-left: 22px;
  border-left: 3px solid var(--forest);
  color: var(--muted);
  font-size: 15px;
}

.section {
  padding: 52px 0 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.section-head h2 {
  margin: 0;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: 28px;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.filter-button {
  appearance: none;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
}

.filter-button:hover,
.filter-button.is-active {
  border-color: var(--forest);
  background: var(--forest);
  color: #fff;
}

.article-list {
  border-top: 1px solid var(--line);
}

.article-row {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) 100px;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  transition: transform 160ms ease, color 160ms ease;
}

.article-row:hover {
  color: var(--forest);
  transform: translateX(4px);
}

.article-date,
.article-category {
  color: var(--muted);
  font-size: 13px;
}

.article-row h3 {
  margin: 0 0 6px;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: 20px;
  line-height: 1.45;
}

.article-row p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.article-category {
  text-align: right;
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.work-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.work-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
}

.work-body {
  padding: 22px;
}

.work-card h3 {
  margin: 0 0 8px;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: 21px;
}

.work-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.page-header {
  max-width: 760px;
  padding: 34px 0 44px;
}

.page-title {
  font-size: clamp(40px, 6vw, 68px);
}

.page-lead {
  max-width: 700px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.prose {
  max-width: 760px;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: 17px;
}

.prose h2 {
  margin: 48px 0 14px;
  font-size: 26px;
  line-height: 1.4;
}

.prose p {
  margin: 0 0 20px;
}

.prose blockquote {
  margin: 32px 0;
  padding: 18px 24px;
  border-left: 4px solid var(--red);
  background: var(--soft-red);
  color: #55372f;
}

.prose ul {
  padding-left: 22px;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(240px, 0.7fr);
  gap: 64px;
  padding-top: 18px;
}

.fact-list {
  border-top: 1px solid var(--line);
}

.fact {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.fact dt {
  color: var(--muted);
}

.fact dd {
  margin: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.footer-inner {
  min-height: 92px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--muted);
  font-size: 12px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a:hover {
  color: var(--forest);
  text-decoration: underline;
}

.empty-state {
  display: none;
  padding: 34px 0;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

@media (max-width: 760px) {
  .header-inner {
    min-height: 60px;
  }

  .site-nav {
    gap: 14px;
    font-size: 13px;
  }

  .site-nav a {
    padding: 18px 0 15px;
  }

  .brand-name {
    display: none;
  }

  .page-shell {
    padding: 28px 0 56px;
  }

  .home-intro,
  .about-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .home-intro {
    padding: 28px 0 38px;
  }

  .home-intro h1 {
    font-size: 42px;
  }

  .article-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .article-category {
    text-align: left;
  }

  .work-grid {
    grid-template-columns: 1fr;
  }

  .section-head,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}